Indicator for lathes.



PATENTED JAN. 30, 1906.

v G. E. PETERSON. INDICATOR FR LATHES'E APPLICATION FILED Mmm-1904.

Quimera ist l ,sees @fietsten u tzheeerrier 2 -1s mounted: andbeermg the tool- UNITi-ni) srA'rEs PATENT. OFFICE'.

eusfrnvnn PnrERsON, OF HARTFORD, -cONNEcricUr INDICA-,ron FORLATHES.

` No. i

N Tddllowhbjm i ttvycncerm 4 n BeitA fthatI/Gus'mvnE. PETERSON, t e citizen offtlie'UllSd Stetes,l ende', resident county* ofHertford and e p t, have invented a new e enddlxnpovedln yesterioriLethes of which the fellewiesji espft'i'fih :Myinventiofn reletes to' the class of devices l fused for determinin Whether a. piece of. Workl 'if nottolvvhatezjttentsuch piece o iworkmey -be outotitstrue position; andthe object of my invention fis to provide al devine, .of thisV is accurately-leitete in alletheo'r loner, and

e. clessthat; inhibe 'retiene-theres" t l l eeeominodet tself-to'work of enysh'a'. e l on Ormond' ,an positiongend sfurth'ero.u

wfl'eexiily `applied -to fworl; of

fi-ieiS" @einen .ewdevee Oil this dan t which valuations 1n-the loeiition ofthe-work from `a,- truefposition 4may 'be-plainly indicated of which. thse objects myii besttainedis illustratedgin theec'eompanying drawings,in

@ta'ilrview of the. indicating-leven! Fig. 5 is a,

, topfy viewfof ethewindicaton showinganother method ofepplying it toa ieee of Work; y

'c .the eecornpringing;A rewings the nunieral'fl indicates the bed of e lathe, on which `post 3,- This toolfpost is fmountedin the usual .menneneppurtenent to the chuck e, in l 4which a piece off Work 5 is seeuige` and in con- .;:o 4inflection Vwith which l my Airn roved indicator is used,` the indicator beingc empedznd held i v in the tool-postinthe seine manner es e tool p foropereting upon the piece of Work heldin Vthechuck. e My improvedindicetor includes obese 6, l suitably shaped .to be'securedin the tool-post i` of theflsthe, as shove described, and suindicetorarln 7 pivotelly connected or. attached Specieation of Letters-Patent Appuasqnnsaiprn 20,1904. serinnmzoasss :15. )This construction provides o resi yieidin connection between the indexing-le- .ver an thepointer'and insures e tight piv- .Otell connectlon, free from'lost motion.

Patenteaianl so, 190e..

by the ivot 410, which allows the indiee'torl armfto e swung in a. piane in s ,trensverse dihaving lglurel number of pivots Withclemp- :ing mee An indicating pointer or hand 11 is pivot- -e,l lyn1`ou11ted on the indicator-erm 7, the free vend vof seid wlth gradue pointer operating in connection 1 1- relipurter'xent to the greduations e. stud 13.

sss'tudlS is'looated'-between spring-arms 14on'the under side of the indicetinlgdever rent or It Willof course be understood that the spring'- enns 14 are sufiicientlyrigid -to maintain e tight connectionfwith the stud 13 under the comparatively easy movement of the pointer and take- 11p-any weer between -the parte. This indieetin -lever is mounted on e pivot --15,`f'bome by ing'faoes o, b5 and c." A spring 17 is slsose-` cured to the, under side of the indicatinglever, the free end Vof the spring being 1n "engagement with e,- toothed disk-18. 'This toothed disk has e recess 19, Whichjseid spring engages, end a pawl 20, secured on theindicator-arm 7, .engages with the. teethv on the periphery ofthe disk tol hold it from eoc1 vdental movement; From this construction it Willbe seen that the free end of the sprin secured tothe indicating-lever that it may he shifted to either onesde or the other oi a line assing through the pivots ofthe pointer and l ever. -Thusthepointer Will he effected inv various .Ways dependent upon. the tensioning f of the springeither et one kside or the other of the line connecting the tivol pivotal vvoints. With the Vs lring exerting force, as in `ieeted in Fig. 2,'tlz` made' use of.' By shiftingthe end of the ons'placed upon the erm.. -The 'pointer 1s preferably mounted on e pivot supe `erin 7, end-hes three Work e Working faces b end cin'ey he vgo `-17 may be so-locatedwith-referenoe to theen loo is connectedorseonred to theindicator-erm f Eto seid base, asfbymeens of e link 8. This spring to the position'indiested in, Fig. 5 the.

5o link.isypivoteditothe bese 6" by :1p-*pivot 9, workmgfece obecomes o eretive.` .prwhich ellow's ;tl1e, indicetor'arm 7A to be ltfwill benotldthett er'indi'cating-ngel' swung ine' plaiiein onedireetion, endfthelmk 1 1 vrand thef/indicetmgiJever .1"5;E are eechgro reg ort vided With/eishort 'end iong erin 'Thee arm of the lever is provided with the working surfaces a, b, and '0, and the long arm is in engagement with the short arm of the indicating-pointer, so that a comparatively* i shoulder within a recess in a piece of work,

' movement of the seen that by providing1 -piece of work held in the c and in Fig. 2 the Jface b is shown in engagement with the inner surface of a piece of work held in the chuck, while in Fig. 5 I have shown the face a in engagement with the bottom of a recess in a piece of work. It will be the three working faces in connection wit the improved construction of joint by which the arm 7 is connected to the base 6 the latter may be clamped in the tool-post of a lathe and the working faces may be located to en age any part of a uck 4 to indicate any untrueness of said iece of work. f

In the operation of tllie device the base 6 is clamped in the tool-post and one of the faces a, b, or c is brought into engagement with the work to be testedand the arm 7 is swung or the base 6 moved until the ointer 11 is located opposite the zero-mar on the index. .The piece of work 5 then being rotated or moved, the .degree or' imperfection in said 'piece of work can be readily ascertained. The

free fend of the pointer the distance of one space'denoted by the marks dicator-arm and pointer.

'cates a movement of the piece of work the one-thousandth part of an on the index in inch.

Obviousv the improved connection between the base and indicator-arm pla s an important part in the adjustment of t e in- The arm may be nicely centered with reference to the work through one of the joints, and then by means of the other joint the arm may be moved to insure the positioning of the pointer at the zero-mark. It may be observed that the scale underlying the p'ointer reads in either direction, and the sim le shifting of the spring 17 to make either of the workin faces a, b, or

c effective determines which si e of the scale the pointer will ltraverse under the influence of the spring. a

What Ic aim as myy invention, and desire 1. In an indicating device, an indicator- --arm'with means of attachment, an indicat- A and an offset portion located transverse to the arm and bearing a plural number of coning-lever mounted on the tact-faces, an indicating-pointer located on the arm in extension and connected with the main part of said lever, and means for resiliently holding the lever and pointer in normal position.

2. In an indicator, a base, a link pivoted to the base, a clamp for said pivot, an indicator-arm pivoted to vsaid link by a pivot eX- tending transverse to the ivot between the link and base, means for c amping the pivot l between the arm and link, an indicating ever mounted on said arm and having a main portion extending lengthwise of the arm and a bent portion' extending transversemain portion said bent portion having a plural number of contact-faces, a pointer ocated on the arm in extension of and connected with the main part ofthe lever, and means for resiliently holding the arm and pointer in normal position.

3. In an indicating device, an indicatorarm with means of attachment, an indicatinglever extending len thwise ofthe arm and pivoted `thereon an having a short extension located at an angle to the main portion of the lever, said short extension having contact-points 4arranged laterally on op osite sides of the lengthwise center thereo and anYindicating-pointer to be operated by said lever. 4. In an indicating device, a narrow indicator-arm with means of attachment, 'an'indicating-lever pivoted on the arm with a short extension located at an angle of less than ninety degrees to the main ortion of the lever, said short extension contact and the' longer extension from the pivot connected with an indicatingointer, the indicating-pointer pivoted on the arm with a short extenslon from the pivot connected with the indicating-lever and with a longer extension from the pivot forming an indicatin -pointer, holding t e pointer and lever in normalposition. 5. In an indicating 4device an indicatorarm with means for attachment, an indicatarm and having an extension provided with a contact-faces, .a p air o f spring-arms secured on the under side of the lever, an indicatingointer having a short arm with a stud located etween the resilient arms on the lever, the opposite end of the pointerforming an indicating device and means for resi-liently holding the pointer and lever in normal position. 6. In an indicator, anindicator-armprovided with means for attachment to a toolpost, an indicating-lever pivotally connected te the orming al '105 and means for resiliently' IIO plural number of to the arm, a pointer mounted on the arm, a3 i connection'between said pointer and lever including a pair of resilient members mountedv on one of said parts, andA a stud projecting from the opposite part and arranged between seid resilient members.

- 7. In an indicator, an arm provided with means of attachment to a tool-post, siii indicating-pointer pivotally mounted on the erin, an indcatingdever pvotally mounted on the erin and connected with the pointer, a spring `with one end engged with the arm, a disk GUSTAVE E. PETERsoN.

Witnesses:

ARTHUR B. JENKINS. Crus. M. BERGLUND. 

